I have a Sony KD65 XG879G coupled with a HTZF9 sound bar. When using the native apps on the TV everything works fine for anything upto 10 minutes when sound completely stops playing completely from the sound bar and even the TV speaker when the bar is turned off until the TV is turned off and on again. Amazon offered me a fix which has worked the one time I've used it but now the problem is on Netflix also. Bar is connected hdmi port 3 to bar and also by optical. Both apps work fine from V6 box but would like to use them from the TV as ultimately virgin may be cancelled.